A miniature in the Sicilian Taimanov Four Knights

today I want to share a game that was surprisingly short. Usually the Sicilian is the somewhat best choice for black against 1. e4. Here black chose an aggressive line in the "Four Knights"-Variation of the Taimanov:

So, what did black do wrong here? Here is a similar game in which black did better but finally lost, mainly due to the better pawn structure white had.